1 /*
2 * Copyright 2023 Fabian Blatz <fabianblatz@gmail.com>
3 * Copyright 2025 Abderrahmane JARMOUNI
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 */
7 #include "lvgl_common_input.h"
8
9 #include <zephyr/device.h>
10 #include <zephyr/kernel.h>
11 #include <lvgl_input_device.h>
12 #include <lvgl_display.h>
13 #include <zephyr/logging/log.h>
14 #include "lvgl_pointer_input.h"
15 #include "lvgl_button_input.h"
16 #include "lvgl_encoder_input.h"
17 #include "lvgl_keypad_input.h"
18
19 LOG_MODULE_DECLARE(lvgl, CONFIG_LV_Z_LOG_LEVEL);
20
lvgl_input_get_indev(const struct device * dev)21 lv_indev_t *lvgl_input_get_indev(const struct device *dev)
22 {
23 struct lvgl_common_input_data *common_data = dev->data;
24
25 return common_data->indev;
26 }
27
lvgl_input_read_cb(lv_indev_t * indev,lv_indev_data_t * data)28 static void lvgl_input_read_cb(lv_indev_t *indev, lv_indev_data_t *data)
29 {
30 const struct device *dev = lv_indev_get_user_data(indev);
31 const struct lvgl_common_input_config *cfg = dev->config;
32 struct lvgl_common_input_data *common_data = dev->data;
33
34 if (k_msgq_get(cfg->event_msgq, data, K_NO_WAIT) != 0) {
35 memcpy(data, &common_data->previous_event, sizeof(lv_indev_data_t));
36 if (lv_indev_get_type(indev) == LV_INDEV_TYPE_ENCODER) {
37 data->enc_diff = 0; /* For encoders, clear last movement */
38 }
39 data->continue_reading = false;
40 return;
41 }
42
43 memcpy(&common_data->previous_event, data, sizeof(lv_indev_data_t));
44 data->continue_reading = k_msgq_num_used_get(cfg->event_msgq) > 0;
45 }
46
lvgl_input_get_display(const struct device * dev)47 static lv_display_t *lvgl_input_get_display(const struct device *dev)
48 {
49 const struct lvgl_common_input_config *cfg = dev->config;
50 const struct device *disp_dev = cfg->display_dev;
51 struct lvgl_disp_data *lv_disp_data;
52 lv_display_t *lv_disp = NULL;
53
54 if (disp_dev == NULL) {
55 LOG_DBG("No display phandle is passed in DT, defaulting to LV Default Display");
56 return lv_display_get_default();
57 }
58
59 for (int i = 0; i < DT_ZEPHYR_DISPLAYS_COUNT; i++) {
60 lv_disp = lv_display_get_next(lv_disp);
61 if (lv_disp == NULL) {
62 LOG_ERR("Could not find LV display objects of all Zephyr displays");
63 break;
64 }
65 lv_disp_data = (struct lvgl_disp_data *)lv_display_get_user_data(lv_disp);
66 if (disp_dev == lv_disp_data->display_dev) {
67 return lv_disp;
68 }
69 }
70
71 LOG_ERR("LV display corresponding to display device %s not found", disp_dev->name);
72 __ASSERT_NO_MSG(false);
73
74 return NULL;
75 }
76
lvgl_input_register_driver(lv_indev_type_t indev_type,const struct device * dev)77 int lvgl_input_register_driver(lv_indev_type_t indev_type, const struct device *dev)
78 {
79 /* Ensure that `lvgl_common_input_data` remains the first member
80 * of indev dedicated data
81 */
82 struct lvgl_common_input_data *common_data = dev->data;
83 lv_display_t *disp;
84
85 if (common_data == NULL) {
86 return -EINVAL;
87 }
88
89 common_data->indev = lv_indev_create();
90
91 if (common_data->indev == NULL) {
92 return -EINVAL;
93 }
94
95 lv_indev_set_type(common_data->indev, indev_type);
96 lv_indev_set_read_cb(common_data->indev, lvgl_input_read_cb);
97 lv_indev_set_user_data(common_data->indev, (void *)dev);
98
99 disp = lvgl_input_get_display(dev);
100 lv_indev_set_display(common_data->indev, disp);
101
102 return 0;
103 }
104
105 #define LV_DEV_INIT(node_id, init_fn) \
106 do { \
107 int ret = init_fn(DEVICE_DT_GET(node_id)); \
108 if (ret) { \
109 return ret; \
110 } \
111 } while (0);
112
lvgl_init_input_devices(void)113 int lvgl_init_input_devices(void)
114 {
115 #ifdef CONFIG_LV_Z_POINTER_INPUT
116 DT_FOREACH_STATUS_OKAY_VARGS(zephyr_lvgl_pointer_input, LV_DEV_INIT,
117 lvgl_pointer_input_init);
118 #endif /* CONFIG_LV_Z_POINTER_INPUT */
119
120 #ifdef CONFIG_LV_Z_BUTTON_INPUT
121 DT_FOREACH_STATUS_OKAY_VARGS(zephyr_lvgl_button_input, LV_DEV_INIT, lvgl_button_input_init);
122 #endif /* CONFIG_LV_Z_BUTTON_INPUT */
123
124 #ifdef CONFIG_LV_Z_ENCODER_INPUT
125 DT_FOREACH_STATUS_OKAY_VARGS(zephyr_lvgl_encoder_input, LV_DEV_INIT,
126 lvgl_encoder_input_init);
127 #endif /* CONFIG_LV_Z_ENCODER_INPUT */
128
129 #ifdef CONFIG_LV_Z_KEYPAD_INPUT
130 DT_FOREACH_STATUS_OKAY_VARGS(zephyr_lvgl_keypad_input, LV_DEV_INIT, lvgl_keypad_input_init);
131 #endif /* CONFIG_LV_Z_KEYPAD_INPUT */
132
133 return 0;
134 }
135